1. School of Computer Science and Engineering Sun Yat‐sen University Guangzhou P. R. China
2. Department of Radiology Nanfang Hospital Southern Medical University Guangzhou P. R. China
3. Perception Vision Medical Technology Company Ltd. Guangzhou P. R. China
4. Department of Radiology University of Michigan Ann Arbor Michigan USA
5. Department of Mathematics and Statistics Old Dominion University Norfolk Virginia USA
6. Key Laboratory of Machine Intelligence and Advanced Computing Ministry of Education Guangzhou P. R. China